rocksdb/util/hash_skiplist_rep.h
Jonah Cohen a14b7873ee Enforce write buffer memory limit across column families
Summary:
Introduces a new class for managing write buffer memory across column
families.  We supplement ColumnFamilyOptions::write_buffer_size with
ColumnFamilyOptions::write_buffer, a shared pointer to a WriteBuffer
instance that enforces memory limits before flushing out to disk.

Test Plan: Added SharedWriteBuffer unit test to db_test.cc

Reviewers: sdong, rven, ljin, igor

Reviewed By: igor

Subscribers: tnovak, yhchiang, dhruba, xjin, MarkCallaghan, yoshinorim

Differential Revision: https://reviews.facebook.net/D22581
2014-12-02 12:09:20 -08:00

44 lines
1.4 KiB
C++

// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#ifndef ROCKSDB_LITE
#pragma once
#include "rocksdb/slice_transform.h"
#include "rocksdb/memtablerep.h"
namespace rocksdb {
class HashSkipListRepFactory : public MemTableRepFactory {
public:
explicit HashSkipListRepFactory(
size_t bucket_count,
int32_t skiplist_height,
int32_t skiplist_branching_factor)
: bucket_count_(bucket_count),
skiplist_height_(skiplist_height),
skiplist_branching_factor_(skiplist_branching_factor) { }
virtual ~HashSkipListRepFactory() {}
virtual MemTableRep* CreateMemTableRep(
const MemTableRep::KeyComparator& compare, MemTableAllocator* allocator,
const SliceTransform* transform, Logger* logger) override;
virtual const char* Name() const override {
return "HashSkipListRepFactory";
}
private:
const size_t bucket_count_;
const int32_t skiplist_height_;
const int32_t skiplist_branching_factor_;
};
}
#endif // ROCKSDB_LITE